Enable selection buttons for ctkDateRangeWidget

The widget is essentially complete for the purposes of the
the ctkDICOM application.  It could have additional options for
picking time ranges.

It would also be nice if the widget didn't resise when selecting
somthing other than "Any Date" but for now it is hiding/showing
the date selection base on context.

Libs/Widgets/ctkDateRangeWidget.cpp

@@ -59,12 +59,15 @@ ctkDateRangeWidget::ctkDateRangeWidget(QWidget* _parent) : Superclass(_parent)
   
   d->setupUi(this);
 
+  d->StartDate->setVisible(false);
+  d->EndDate->setVisible(false);
+
   QObject::connect(d->AnyDate, SIGNAL(clicked()),this, SLOT(onAnyDate()));
   QObject::connect(d->Today, SIGNAL(clicked()),this, SLOT(onToday()));
   QObject::connect(d->Yesterday, SIGNAL(clicked()),this, SLOT(onYesterday()));
   QObject::connect(d->LastWeek, SIGNAL(clicked()),this, SLOT(onLastWeek()));
   QObject::connect(d->LastMonth, SIGNAL(clicked()),this, SLOT(onLastMonth()));
-  //QObject::connect(d->SelectRange, SIGNAL(clicked()),this, SLOT(onSelectRange()));
+  QObject::connect(d->SelectRange, SIGNAL(clicked()),this, SLOT(onSelectRange()));
 }
 
 // --------------------------------------------------------------------------
@@ -113,42 +116,72 @@ void ctkDateRangeWidget::setDateTimeRange(QDateTime startDateTime, QDateTime end
 void ctkDateRangeWidget::onAnyDate()
 {
   Q_D(const ctkDateRangeWidget);
-  logger.info("selected AnyDate");
+  d->StartDate->setEnabled(false);
+  d->EndDate->setEnabled(false);
+  d->StartDate->setVisible(false);
+  d->EndDate->setVisible(false);
 }
 
 // --------------------------------------------------------------------------
 void ctkDateRangeWidget::onToday()
 {
   Q_D(const ctkDateRangeWidget);
-  logger.info("selected Today");
+  QDateTime now = QDateTime::currentDateTime();
+  d->StartDate->setDate(now.date());
+  d->EndDate->setDate(now.date().addDays(1));
+  d->StartDate->setEnabled(false);
+  d->EndDate->setEnabled(false);
+  d->StartDate->setVisible(true);
+  d->EndDate->setVisible(true);
 }
 
 // --------------------------------------------------------------------------
 void ctkDateRangeWidget::onYesterday()
 {
   Q_D(const ctkDateRangeWidget);
-  logger.info("selected Yesterday");
+  QDateTime now = QDateTime::currentDateTime();
+  d->StartDate->setDate(now.date().addDays(-1));
+  d->EndDate->setDate(now.date());
+  d->StartDate->setEnabled(false);
+  d->EndDate->setEnabled(false);
+  d->StartDate->setVisible(true);
+  d->EndDate->setVisible(true);
 }
 
 // --------------------------------------------------------------------------
 void ctkDateRangeWidget::onLastWeek()
 {
   Q_D(const ctkDateRangeWidget);
-  logger.info("selected LastWeek");
+  QDateTime now = QDateTime::currentDateTime();
+  d->StartDate->setDate(now.date().addDays(-7));
+  d->EndDate->setDate(now.date());
+  d->StartDate->setEnabled(false);
+  d->EndDate->setEnabled(false);
+  d->StartDate->setVisible(true);
+  d->EndDate->setVisible(true);
 }
 
 // --------------------------------------------------------------------------
 void ctkDateRangeWidget::onLastMonth()
 {
   Q_D(const ctkDateRangeWidget);
-  logger.info("selected LastMonth");
+  QDateTime now = QDateTime::currentDateTime();
+  d->StartDate->setDate(now.date().addDays(-31));
+  d->EndDate->setDate(now.date());
+  d->StartDate->setEnabled(false);
+  d->EndDate->setEnabled(false);
+  d->StartDate->setVisible(true);
+  d->EndDate->setVisible(true);
 }
 
 // --------------------------------------------------------------------------
 void ctkDateRangeWidget::onSelectRange()
 {
   Q_D(const ctkDateRangeWidget);
-  logger.info("selected SelectRange");
+  d->StartDate->setEnabled(true);
+  d->EndDate->setEnabled(true);
+  d->StartDate->setVisible(true);
+  d->EndDate->setVisible(true);
 }
 
 
@@ -157,6 +190,7 @@ void ctkDateRangeWidget::setIncludeTime(bool includeTime)
 {
   Q_D(ctkDateRangeWidget);
   d->includeTime = includeTime;
+  logger.error("including time in the date range is not supported now");
   if ( includeTime )
   {
     // TODO: set time format 
@@ -173,6 +207,7 @@ void ctkDateRangeWidget::setIncludeTime(bool includeTime)
 // -------------------------------------------------------------------------
 bool ctkDateRangeWidget::includeTime()const
 {
+  logger.error("including time in the date range is not supported now");
   Q_D(const ctkDateRangeWidget);
   return d->includeTime;
 }